| Standard label: | Present Value of Future Insurance Profits, Weighted Average Amortization Period |
| Name: | us-gaap:PresentValueOfFutureInsuranceProfitsWeightedAverageAmortizationPeriod |
| Documentation: | Weighted average amortization period of present value of future profits of insurance contract acquired in business combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. |
| Object type: | cm:Concept |
| Data type: | xbrli:durationItemType |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PresentValueOfFutureInsuranceProfitsWeightedAverageAmortizationPeriod |
| Label | Role | Language |
| Present Value of Future Insurance Profits, Weighted Average Amortization Period | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 350 30 50 1 (a)(3) | http://fasb.org/us-gaap/role/ref/legacyRef | 350 |
| FASB Accounting Standards Codification 944 805 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |